Miter-box



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JJ.G RBBN. MITER BOX.

No. 522,591. Y f Patented July 10, 1894.

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r UNiT-D STATES lPAKFENT f A OFFICE.

JOHN JAY GREEN, OF BQONTON, NEW JERSEY.

Mirna-Box.

' SPECIFICATION forming part of Letters Patent No. 522,591, dated July10,1894. Application liled October 26. 189,3. Serial No.489,170. (Nomodel.)

To al@ whom 'it may concern:

Be it known that I, JOHN J AY GREEN, a citizen of the United States,residing in Boonton, in the county of Morris and StateV of New Jersey,have invented certain new and useful Improvements in Miter-Boxes, ofwhichthe` followingis a specication.'

The object of this invention is to produce a self-measuring miter boxcheap and' simple in construction,which will admit an accuratevbisection o f any angle at which a mitered joint is desired by directapplication of the niiter box to the corner for which the mitering is tobe done. Miters are ordinarily made by first determining the angle andthen selecting the nearest angle in a box provided with a number of sawguides, or setting an adjustable instrument to the determined angle. Bymy invention, however, the miter box may be applied directly to thecorner to get the true angle, and thus errors in determination of theangle are avoided band much time is saved.

In the accompanyingdrawings which illustrate the invention, Figure l isa plan view of a miter box showing the frame wliichcarri'es the sawguides thrown back upon its hinge, and indicating two positions, one infull and the otherin dotted lines, of the guides for the material. Fig.2 is a plan viewot` the miter box in position for use. Fig. 3 is a sideelevation of Fig. l; and Fig. 4 is a bottoniy plan viewof a material. l

A represents a suitable stock upon the front end of which is pivotedthree castings B, C, D, one of these, B, havingV formed integraltherewith an upright work-guide E. The faces of the castings C and Dform shelves or tables upon which the material to be mitered rests, oneacting as a support on the right sideand the other on the left side ofthe box. The castings are preferably formed in skeleportion lof theguide for the l ton shape so as to reduce the weight to a minimum. Eachof the castings C and D is formed of a thin shelf, as indicated,provided with a rib underneath at the end and bending downwardly andoutwardly on the outside, form- `ing a ledge on which the arm B slides,as indicated in dotted lines in Fig. 2, and in fullV lines in Fig. 3.The rib serves to give strength and valso. to form an abutment for abindingt screw F, which locks the adjustable arm B, and also4 as asupport for set-screws G, II. The adjusting screws G, H act as lixedstops for the swinging arm B, and permit the latter which carries thework-guide to be brought into accurate alignment with the outer edgesofthe tables C, D which determine the angle when the box is applied to acorner. Moreover, it is sometimes desired to have the sides ofn'thejoint spread somewhat from the meetl ing edge, as in cases where onlyone edge of the joint will be exposed to view, thus permitting a closejunction to be made at that edge without additional cutting; in such,cases adjustment of the screws G, H permit .the material to be sawed sothat the sides of 'the joint will slope away from the meeting edge. Witha fine saw, however, the cuts will be clean and the angle accuratelybisected so that the edges will fit closely together along the wholeline of the joint, and in such cases the screws G, H will be set tobring the work-guide in accurate alignment with the outer edges of thetables C, D which determine the angle. The lower flange of the stiffcasting, in which is provided bracketsV for blocks'N, O, containing thesaw kerfs suitableholes beiiigttapped in the brackets for the receptionof screws to fasten the blocks.

The bracket orI plate in which the arm M is.

journaled is provided with slots T, T which permit it tobe shifted tobring the saw kerfs accurately on the line bisecting the angle; and the'top of the pin R projects to form a bearing for a recess or socketformed on the under side of the free end of arm M, as indicatedin-dotted lines, Fig. 3, so that when the arm M is adjusted by meansofthe slots T, T the free end will swing upon a center accurately on thebisecting line. Y

The saw guides will of course with advantage be placed a considerabledistance apart-- the farther the more accurate will be lthe IOC cut--and I prefer in order not to unnecessarily increase the weight ofthe apparatus to permit the outer saw guide O to project beyond thepivot R; and to enable it` to be removed when the box is applied to acorner to measure the angle, the arm M is journaled as alreadydescribed. Thus it may be tilted back as indicatedin dotted lines, Fig,when the angle is measured, and the outer edges of the tables C, D maybe brought against the sides of the corner.

The slide J is provided with a set-screw P bydvtIfhieh it may be lockedin position on the ro '.llhe arm M is provided with a projection Q whichserves as a stop when the kerfs are ralsed from their normal position tothe positlon indicated in Figs. l and 3.

The castings are all preferably formed of malleable iron. The parts B,C, D are pivoted upon an upright post R at the forward end of the miterbox. The arm B which carries the work-guide E is mounted so that it maybe swung into operative relation to either of the tables C, D, and theribs on the lower part of these tables are provided with a shoulder, asindicated at S, provided with an inclined side, by which thebindingscrew F may firmly lock the arm B in position.

The guides or kerfs for the saw are preferably made in blocks of hardwood which are secured to the casting by screws so that they may berenewed when worn out.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A initer box comprising two arms, means for adjusting them intocontact with the sides of a corner inside or outside to measure itsangle, and a saw guide lying on a line bisecting the angle.

2. A miter box comprising two arms adjustable to various angles, a sawguide lying on a line bisecting any angle formed by the arms, and anadjustable work guide adapted to be brought into operative vrelation toeither arm.

3. A miter box comprising two pivoted tables or guides for the work,rigid links connecting said guides with an adjusting slide, means forlocking the slide in dierent positions of adjustment, a pivoted armprovided with a vertical wall adapted to be brought into cooperativerelation to either table or guide, and means for locking said arm inposition when set upon either guide.

4. A miter box provided with a stock to which are pivoted at the forwardend two arms for measuring the angle, rigid links connecting the samewith a slide, a rod mounted upon the stock as a guide for the slide,means for locking the slide in various positions of adjustment, and anarm carrying the guides for the saw, said arm normally projecting overthe rod, for the purpose described, and adapted to be withdrawn when theangle is being measured.

In testimony whereof I have hereunto subscribed my name this 25th day ofOctober, A. D. 1893.

JOHN JAY GREEN.

VVtnesses:

RoBT. H. READ, E. C. Gares.

